Resguardo inicial

linux-7.2.3/arch/xtensa/mm/ioremap.c

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ioremap implementation.
+ *
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ */
+
+#include <linux/io.h>
+#include <linux/pgtable.h>
+#include <asm/cacheflush.h>
+#include <asm/io.h>
+
+void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
+			   pgprot_t prot)
+{
+	unsigned long pfn = __phys_to_pfn((phys_addr));
+	WARN_ON(pfn_valid(pfn));
+
+	return generic_ioremap_prot(phys_addr, size, prot);
+}
+EXPORT_SYMBOL(ioremap_prot);
+
+void iounmap(volatile void __iomem *addr)
+{
+	unsigned long va = (unsigned long) addr;
+
+	if ((va >= XCHAL_KIO_CACHED_VADDR &&
+	      va - XCHAL_KIO_CACHED_VADDR < XCHAL_KIO_SIZE) ||
+	    (va >= XCHAL_KIO_BYPASS_VADDR &&
+	      va - XCHAL_KIO_BYPASS_VADDR < XCHAL_KIO_SIZE))
+		return;
+
+	generic_iounmap(addr);
+}
+EXPORT_SYMBOL(iounmap);